Pulverizing apparatus



R. H. CHALLACOMBE. PULVERIZING APPARATUS.

APPLICATION FILED MAY 4, 1916.

1,338,421 Patented p 27, 1920.

2 SHEETS-SHEET I.

ATT '1" R. H. CHALLACOMBE.

PULVERIZING APPARATUS.

APPLICATION man MAY 4, 1916.

1", 3'38A21 Patented Apr. 27, 1920.

2 SHEETS-SHEET 2.

30mm H. CHALLACOMBE, or SAN raAivoxsco, CALIFQBNIA.

PULV-EBIZING AIPARATUS.

Specification of Letters Patent.

Patented. Apr. 27, 1920.

Application filed May 4, 1916. Serial No. 95,326-

To all whom it may concern:

Be it known that I, ROBERT H. CHALLA- coMBE, a citizen of the United States, residing at the city and county of San Francisco, State of California, have invented certain new and useful Improvements in Pulverizing Apparatus, whereof the following is a specification.

This invention relates to a pulverizing apparatus and more particularl to an apfaratus of this nature having a p urality 0 pu1- verizing elements which revolve about their own axes and which also travel about the axis of the pulverizing chamber.

One of the primary objects of the invention is toprovide a pulverizing apparatus so constructed that the pulverizing elements in their successive rotations about the axis of the machine will track over different portions of a grinding plate so as not to wear grooves in the plate and so as to contact with all of the material resting thereon.

Another and more specific object of the invention is to provide in an apparatus of this nature yieldable pulverizing mechanism which is forced against the grinding plate or material to be pulverized by the spring tension.

Another object of the invention is to provide a machine wherein interchangeable elements of different designs maybe employed to operate upon the material to be treated.

Withthese and other objects in view the invention aims to generally improve apparatus of this nature to render it more sub stalntial, practical and commercially desirab e.

With these and other objects in view, the invention consists in certain novel features of construction, combination and arrange- .ment of parts as will be hereinafter fully illustrated, described and claimed.

In the drawings Figure 1 is a side elevation of the apparatus shown partly in section.

Fig". 2 is a top plan view partly broken away and partly in section.

Fig. 3 is a detailed perspective view of a mixing element, and

Fig. 4 is a detailed perspective view of a cutting member.

Referring 1n detail to the drawings by numerals, 1 designates as an entirety thecasing of the apparatus, said casing. having a bottom portion 2, a central portion 3, and a top or cover 4. The casing is mounted on a base 5 and its bottom portion 2 is formed with a central upstanding bearing 6, in the upper end of which is fitted a main shaft 7. The upper end of this shaft is received within the offset bearing 8 formed on the cover 4.

A power shaft 9 extends through the boxing 10, carries on its outer end the driven pulley 11 and intermediate its ends the beveled gear 12 which meshes with the gear 13 rigidly secured to the shaft 7.

A master spur gear 14 is rigidly secured to the shaft 7 and meshes with the supplementary spur gears 15 which in turn engage the internal gear 16 formed on the central portion 3 of the casing as is clearly shown in Fig. 1.

ach of the supplementary gears 15 is rigidly secured to a shaft 18 which extends beyond both faces of the gear, the upper portions of the shafts 18 extend through openings formed in the spacing disk or yoke 19, and the lower portions of the shafts 18 extend through and beyond a second spacing disk 20. These disks are carried by the shaft 7 and hold the shafts 18 in fixed spaced relation.

The bearing 6 is formed around its upper terminal with an oil retaining cup 21,- which is guarded from dust and other accumulations by the-depending flange 22 formed on the disk 20. This disk is provided adjacent its periphery with an oil retaining groove 23 which is similarly guarded from dust and other extraneous matter by the depending flange 24.

In the drawing I have shown three sets of pulverizing mechanisms, but it will be understood that this number may be varied at will without departing from the scope of the invention. Each set of mechanisms comprises a spider or frame 25 preferably formed with three arms 26, and each of these arms carries a pulverizing wheel or roller 27 here shown as having a removable shell or tire 28 which acts also as an oil retaining device.

Each set of rollers is caused to travel around the grinding or'pulverizing plate 29 by. a connecting member 30 secured to the shaft 18 by any suitable means such as the set screw 31. i This connecting member is formed with three depending arms 32 which project between the arms of the frame or spider 2 5, and is also provided with an oil retaining flange 30, overhung by a guard flange as shown. Between the arms 32 is arranged an expansive spiral spring 38 to engage and force the frame or spider 25 downwardly thereby holding the rollers 27 in close contact with the plate 29.

In operation the main shaft 7 is driven by the gear 13 and being keyed to the master gear 14 drives the same causing the supplementary gears 15 to rotate about their axes and to travel in a circle around the axis of the gear 14 as will be clearly understood. The gears 15 and shafts 18 in their rotation about the central gear 14 carry with them the connecting members 30 which engage the frames of the pulverizing mechanisms. v

The number of revolutions each of the supplementary gears 15 makes about its axis for each revolution of the gears around the master gear 14 is directly proportional to the-number of teeth in the internal gear 16, as compared with the number of teeth in the supplementary gear. In order that the rollers 27 shall not travel over the same paths on each revolution around the gear 14, I do not proportion the teeth in the internal gear 16 as a multiple of the teeth inthe gear 15, but have them some odd number. This causes the rollers 27 to travel over slightly different paths on each revolution around the master gear 14, and therefore all of the material on the plate 29 will be sub jected to a pulverizing action and no grooves will be worn in the plate 29.

Material to be pulverized is fed'into the apparatus along with suitable quantity of 'WfltGI or other means through the pipes 34,

or chute of which any number may be employed. The material as it reaches the desired degree of pulverization' is splashed through the screens 35 I into the inclined trough 36 formed on the bottom section 2 of the casing and is drawn off through the opening 37 When desired the pulverizing rollers may be discarded and the mixer member 38, illustrated in Fig. 3, used instead. Some material will have to be subjected to the action of cutters 39, such as shown in Fig. 4, and in such cases the cutters and mixer are secured 'to the lower terminals'of the shafts by any suitable means. v

On theicasing: 40 are hand hole covers and 41 feed hole covers.

From the foregoing description, taken connection with the accompanying drawings, it will be apparent that I have perfected a very simple and practical pulverizlng apparatus which will most effectually operate upon material to be pulverized and which is so constructed that different means for actmg upon the material may be used interchangeably. s

to be pulverized.

Having thus described my invention, and an embodiment of it, in the full, clear and exact terms required by law, and knowing that it comprises novel, useful and valuable improvements in the art to which it pertains, I here state that I do not wish to be limited to the precise construction and arrangement of the several parts,as herein set forth, as the same may be variously modified by a skilled mechanic without departing from the spirit of the invention.

lVhat I claim and desire to secure by Letters Patent of the United States, is the following, to wit r 1. In a pulverizing apparatus, a casing, rotary mechanism within said casing including an internal fixed gear and a supplementary gear adapted to revolve said mechanism and means on one of said gears for changing the path of travel of said rotary mechanism. 7

2. In a pulverizing apparatus, a casing, a rotary mechanism within said'casing including an internal fixed gear and a supplementary gear, adapted to revolve said mechanism one of said gears having a different number of teeth for changing the path of travel of said rotary mechanism. 7

3. In a pulverizing apparatus, a casing, pulverizing mechanism in said casing, rotating shafts mounted in said casing, a series of triangularly disposed arms, rollers journaled on said arms, connecting members secured-to said rotating shafts and loosely engaging said. arms, expansion springs 100 mounted centrally within said connecting members and adapted to yieldably hold said arms in engagement with the material 7 4. In a pulverizinglapparatus, a casing, a

"central vertical shaft in said casing, a master gear rigid on said shaft, a supplementary gear meshed with said master gear, a fixed internal gear meshed with said supplementary gear, a vertical shaft for'said supplementary' gear, a pulverizing mechanism comprising, radial arms carried bysaid last named. shaft and rollers mounted on said radial arms. V

5, In a pulverizing apparatus, a casing having a central lateral portion, meansfor feeding material in said casingconsisting of a plurality of pipes'secured to said central lateral portion, a plurality of 'triangus larly disposed pulv'erizing rollers arranged 1 20 inseries for said material and means fo'r operating each series independently.

6. In a pulverizing apparatus, a casing, a central vertical shaft within said casinga master gear rigid with said shaft, a supplementary gear meshed with said master gear,

an internal gear formed on the casingand meshing with said supplementary gear, a

shaftlcarried by the supplementary gear,

provided with "a connec'ti-ng memben'pul 1 30 7 verizing rollers triangularly disposed engaging said connecting member and operated thereby.

7. In a pulverizing apparatus, a casing, a central vertical shaft within said casing, a master gear rigid with said shaft, a supplementary gear meshed with said master gear, an internal gear formed on the casing and meshing with said supplementary gear, a shaft carried by the supplementary gear, pulverizing mechanism, and a connecting member rigidly secured to said last mentioned shaft and engaging said pulverizing mechanism.

8. In a pulverizing apparatus, a casing, a central vertical shaft Within said casing, a master gear rigid with said shaft, a plurality of supplementary gears meshed with said master gear, means for holding said supplementary gears in fixed spaced relation, triangularly disposed pulverizing mechanisms, and means connecting said supplementary gears to said pulverizing mechanisms whereby a rotation of the master gear will turn the pulverizing mechanisms about their axes and about the axis of the casing.

9. In a pulverizing apparatus, a casing, a central vertical shaft within said casing, a master gear rigid with said shaft, a supplementary gear meshed with said master gear, an internal gear formed on the casing and meshing with said supplementary gear, a shaft carried by the supplementary gear, provided with a connecting member, pulverizing mechanism secured to said connecting member, and a bearing for said last mentioned shaft.

In testimony that I claim the foregoing I have hereto set my hand in the presence of two Witnesses, this 29 da of A ril 1916.

ROBERT H. 0 ALL coMBE.

I/Vitnesses:

O. M. HART, A. S. PARI'J. 

